GB1191360A - Improvements in or relating to Thermography Equipment. - Google Patents

Improvements in or relating to Thermography Equipment.

Info

Publication number
GB1191360A
GB1191360A GB60478/68A GB6047868A GB1191360A GB 1191360 A GB1191360 A GB 1191360A GB 60478/68 A GB60478/68 A GB 60478/68A GB 6047868 A GB6047868 A GB 6047868A GB 1191360 A GB1191360 A GB 1191360A
Authority
GB
United Kingdom
Prior art keywords
channel
output
display
isotherm
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB60478/68A
Inventor
Tore Bertil Reinhold Ollson
Aeke Valentin Nillsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saab Bofors AB
Original Assignee
Bofors AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bofors AB filed Critical Bofors AB
Publication of GB1191360A publication Critical patent/GB1191360A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/30—Transforming light or analogous information into electric information
    • H04N5/33—Transforming infrared radiation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Radiation Pyrometers (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

1,191,360. Infra-red television. BOFORS A.B. 19 Dec., 1968 [22 Dec., 1967], No. 60478/68. Heading H4F. Specification describes thermography equip. ment comprising an infra-red detector and a cathode-ray tube display scanning in synchronism and a circuit, Fig. 1, connecting the video output of the detector at 1 to the input of the intensity modulation means of the display tube of 6, the circuit comprising a first linear amplifier channel 2, 3 operable to produce a display varying in brightness according to the temperature of the scene being scanned and a second non-linear amplifier channel 7, connectible in parallel with the first channel by the closure of switch 8 and amplifying only those video signals falling with a range corresponding to a predetermined temperature thereby producing on the normal linear display an isotherm contour, the output of channel 7 is shown at A, Fig. 2, and the output of amplifier 3 at B, including the dotted peak portions therein. Such that said peak portions shall not produce in the composite display a region of brightness equal to and thus confusible with, the isotherm, a limiter 9 is brought into circuit by switch 4 synchronously with closing switch 8, whereby the signal at B is limited to below the output of channel 7. The brightness of isotherm is made constant by the removal of the signal from the first channel by means of first channel gate 5, opened by the pulses in the output of channel 7. The composite signal is thus shown at C, Fig. 2. A transistorized embodiment of limiter 9 and gate 5 is given, Fig. 3 (not shown).
GB60478/68A 1967-12-22 1968-12-19 Improvements in or relating to Thermography Equipment. Expired GB1191360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE17741/67A SE307021B (en) 1967-12-22 1967-12-22

Publications (1)

Publication Number Publication Date
GB1191360A true GB1191360A (en) 1970-05-13

Family

ID=20303942

Family Applications (1)

Application Number Title Priority Date Filing Date
GB60478/68A Expired GB1191360A (en) 1967-12-22 1968-12-19 Improvements in or relating to Thermography Equipment.

Country Status (6)

Country Link
US (1) US3591713A (en)
BE (1) BE725819A (en)
FR (1) FR1599951A (en)
GB (1) GB1191360A (en)
NL (1) NL6818218A (en)
SE (1) SE307021B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT303141B (en) * 1970-01-20 1972-11-10 Siemens Ag Arrangement for evaluating certain parts of the image
SE340531B (en) * 1970-03-26 1971-11-22 Bofors Ab
SE340532B (en) * 1970-03-26 1971-11-22 Bofors Ab
GB1355131A (en) * 1971-07-29 1974-06-05 Philips Electronic Associated Video contour determining circuit
US4038688A (en) * 1976-01-19 1977-07-26 The United States Of America As Represented By The Secretary Of The Army Automatic low frequency gain limiting by addition method in video processing system
US4118733A (en) * 1976-03-30 1978-10-03 Elliott Brothers (London) Limited Surveillance arrangement including a television system and infrared detector means
DE2950317A1 (en) * 1979-12-14 1981-06-19 Agfa-Gevaert Ag, 5090 Leverkusen ELECTROTHERMOGRAPHIC DEVICE
US5999842A (en) * 1997-05-29 1999-12-07 Computerized Thermanl Imaging Company Functional thermal imaging apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371160A (en) * 1964-01-31 1968-02-27 Rca Corp Television circuit for non-additively combining a pair of video signals
US3354266A (en) * 1964-05-25 1967-11-21 North American Aviation Inc Isophote converter
CA785982A (en) * 1965-09-09 1968-05-21 De Boeck Willy Subtitling installation for television programs

Also Published As

Publication number Publication date
US3591713A (en) 1971-07-06
FR1599951A (en) 1970-07-20
BE725819A (en) 1969-05-29
SE307021B (en) 1968-12-16
DE1814642B2 (en) 1971-02-18
NL6818218A (en) 1969-06-24
DE1814642A1 (en) 1969-07-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PLNP Patent lapsed through nonpayment of renewal fees